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Military zipcodes often do not have a defined area - as military units are mobile. The zipcode may direct mail to varying actual physical places. Certain extre

• wickawic 9y ago
  It's worth noting that the zip-for-building case is very common, most cities with skyscrapers have a few with their own zip. It still definitely counts as an edge case though, in the sense that if the building were torn down or foreclosed I don't think its block would still warrant its own code
  • potatolicious 9y ago
    Indeed, and it's important to remember that skyscraper-zipcodes create holes in otherwise regular polygons, which is often not accounted for when storing shapes of zipcodes. Lots of edge cases abound when using zipcodes, especially zipcodes in a spatial context.
  • snerbles 9y ago
    > It still definitely counts as an edge case though, in the sense that if the building were torn down or foreclosed I don't think its block would still warrant its own code For example, the World Trade Center's zip code was retired after the 9/11 attacks. https://en.wikipedia.org/wiki/10048_(ZIP_code) https://en.wikipedia.org/wiki/10048_(ZIP_code)
  • sfifs 9y ago
    In Singapore, every building of a reasonable size has its own zip code